Preheat oven to 350° F
Whisk flour, baking soda, baking powder, salt, and spices in a large bowl.
Whisk sugar, water, oil, eggs, and pumpkin in a separate bowl.
Add wet ingredients to the dry ingredients and mix until just combined. Be careful not to overmix.
Grease your bundt pan.
Fill each well 2/3 the way full with batter. Bake for 20-25 minutes or until a cake tester comes out clean.
Allow to cool 10 minutes before turning out onto a wire rack.
Whisk powdered sugar, vanilla, and milk together in a bowl. Drizzle over completely cooled cakes.